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Question

Solve the following pairs of linear (simultaneous) equation by the method of elimination :2x+3y=8, 2x=2+3y

A
x=2, y=32
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B
x=3, y=5
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C
x=52, y=1
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D
x=32, y=4
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Solution

The correct option is C x=52, y=1
The equation 2x=2+3y can be rewritten as 2x3y=2, therefore, the equations are:

2x+3y=8.........(1)

2x3y=2.........(2)

Subtract Equation (2) from Equation (1) to eliminate x, because the coefficients of x are the same. So, we get

(2x2x)+(3y+3y)=82

i.e. 6y=6

i.e. y=1

Substituting this value of y in the equation 2x=2+3y, we get

2x=2+3

i.e. 2x=5

i.e. x=52

Hence, the solution of the equations is x=52,y=1.

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